Abstract: A control valve that forms part of a draft control system is disclosed herein. The control valve is designed to raise the implement with respect to the vehicle at one rate of speed and automatically increase the rate of raising the implement when a predetermined magnitude of change of position is required.

Abstract: The sensing system disclosed herein is adapted to control the position and/or draft of an implement connected to a vehicle through draft arms that are positioned by a rock shaft. The setting of the rock shaft is accomplished by a hydraulic motor having fluid supplied thereto by a control valve and the desired setting is made by a manual control lever. The control lever, rock shaft and draft arms have sensing devices associated therewith, each of which includes a variable inductance coil fixed on the vehicle and a plunger movable with respect to the coil. Each sensing device has a continuous output which is the function of the position of the member associated therewith.